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426 - 450 of 1090 Items << < 13 14 15 16 17 18 19 20 21 22 > >>
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View of the Arizona valve house built into the wall of Black Canyon. Remnants of scaffolding and construction equipment can be seen around the valve house.
1935-06-24
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Night view, taken from above, of water spewing from the outlet works at Hoover Dam. The scene is lit up with electric lighting.
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Night view of water spewing from the outlet works at Hoover Dam.
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View of the Hoover Dam construction site, looking upstream from the lower cofferdam. The nearly-completed dam face is seen in the background, and cars and trucks are seen on dirt roads in the cofferdam. Scaffolding and concrete pouring forms are...
1935-01-28
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View looking upstream from the Arizona spillway gate house towards construction on the upstream abatement wall in Black Canyon. An electric dragline is seen on the right behind the spillway. Concrete pouring forms are visible on the abatement...
1935-09-26
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General view of the switchyard at Hoover Dam. A power shovel, dump truck, and other construction equipment are visible. Buildings and a few construction workers are also seen.
1935-09-27
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Center of the photo shows diversion tunnel no. 2 with the curved trashrack barricade being constructed in front. Rebar extends up from the concrete barricades. A train trestle runs across the photo, above the diversion tunnel. Cables can be seen...
1934-05-25
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Shows the interior of a valve house. Note three gates and needle valves have been installed.
1935-10-29
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View of Hoover Dam during construction. The view was taken from high above, looking downstream, and shows the intake towers, roads, buildings and structures, a cable across the dam, and the reservoir (later known as Lake Mead).
1935-01-08
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View,looking downstream, of Hoover Dam and the intake towers. There is a boat on Lake Mead (the reservoir).
1935-11-26
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Shows the Nevada construction adits, valve house and plug adit portal. Note the absence of the compressor plant. The beginning of the upstream of the lower portal road tunnel is visible. Buildings and structures, roads, and cables are visible.
1935-08-21
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Shows the interior of a power house turbine gallery during the construction of Hoover Dam.
1935-04-10
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Right side of image shows three drum gates in varying stages of installation. Foreground gate is the most complete. Cable way can be seen across the top. Concrete forms are on the left.
1934-04-28
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Shows concrete pouring forms for the portal of no. 4 raise.
1934-10-25
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Shows construction, looking downsteam into no. 4 raise from the Arizona spillway bridge at Hoover Dam.
1935-02-25
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Shows construction men working on an intake tower and bridge. They are lowering the trashracks into their respective slots. Also shows a crane and hoisting machinery. Cables cross overhead.
1935-05-27
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View, looking toward Arizona intake tower control house, of construction workers placing concrete forms for pouring on the bridge. There are workers standing on top of the control house, too. A crane can be seen in the right background of the...
1935-03-25
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View of Hoover Dam construction site with the intake towers and Colorado River visible above. The power houses are under construction at the base of the dam. A cable spans the canyon and several construction buidngs are shown. There is high...
1934-11-02
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Construction workers are seen working amid the wood and steel framework during construction of the Arizona power house. Unfinished penstock tunnel portals can be seen in the canyon wall in the background.
1934-06-14
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View of construction on the Arizona spillway and the no. 4 penstock raise. Black Canyon surrounds the construction site. An electric dragline and trucks are seen on the dirt road above the spillway.
1934-08-21
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Close-up of framework inside the unfinished opening of a penstock tunnel. Construction workers can be seen in the foreground on what appears to be a transportation track.
1934-06-21
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Close-up of the partially-completed construction on the Arizona spillway.
1934-07-24
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Aerial view of the Hoover Dam construction site in Black Canyon. Construction on the intake towers is seen in the canyon walls behind the dam face and construction on the power houses is seen in the river bed in the foreground. Cables crossing the...
1934-07-31
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View of Hoover Dam and power house under construction. Buildings and structures, concrete pouring forms, cables, and a crane can be seen. Some construction workers and trucks are also pictured. Above the dam part of an intake tower is sticking up.
1934-05-29
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This photograph shows construction workers using a hose attached to a tank filled with water to water down the dirt at the Dam site. The water tank is attached to a truck bed. Three workers are operating the water hose. Two other workers are...
2024-04-28
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